Hi, I have two tables Encounter & Encounter_History. They have same columns. One column is of type CLOB. My requirement is to retrieve all the distinct records from both the tables with order by a date column. But problem is, UNION does not work in case of CLOB data type.
I know it will work if I use UNION ALL, but it returns duplicate records.
Please give me suggestion, how to solve this problem.
For example: The following query does not work since column1 is a CLOB data type
select column1 from table1 union select column1 from table2
subject: UNION for Columns of CLOB data type does not work